Could anyone educate me on why I’m getting this thin white anti-aliasing line on my foreground image after replacing my sky? I’m working in Maya and rendered out the scene before bringing into photoshop. I found a background image I wanted to use but keep getting this thin white aliasing.

What would you recommend I do to correct it. I haven’t gotten to color correcting the new sky/backplate because of the issue I’m having. I’d like to correct “it” before tweaking this image.